Re: [PATCH v6 04/13] arm64/kvm: hide ptrauth from guests
From: Peter Maydell
Date: Wed Dec 19 2018 - 10:22:03 EST
On Mon, 10 Dec 2018 at 20:22, Richard Henderson
> On 12/10/18 2:12 PM, Kristina Martsenko wrote:
> > The plan was to disable trapping, yes. However, after that thread there
> > was a retrospective change applied to the architecture, such that the
> > XPACLRI (and XPACD/XPACI) instructions are no longer trapped by
> > HCR_EL2.API. (The public documentation on this has not been updated
> > yet.) This means that no HINT-space instructions should trap anymore.
> Ah, thanks for the update. I'll update my QEMU patch set.
Just to follow up on this loose end, this change to HCR_EL2.API
trap behaviour is documented in the 00bet9 release of the system
register XML which came out today: